YOU SAID:

are cars supposed to do this

INTO JAPANESE

これを行うことになっている車です

BACK INTO ENGLISH

It is a car that is supposed to do this

INTO JAPANESE

これをすることになっているのは車です

BACK INTO ENGLISH

It is the car that is supposed to do this

INTO JAPANESE

これをすることになっているのは車です

BACK INTO ENGLISH

It is the car that is supposed to do this